--- product_id: 30336700 title: "NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack)" brand: "ngk" price: "$87.93" currency: USD in_stock: true reviews_count: 13 category: "Ngk" url: https://www.desertcart.us/products/30336700-ngk-6441-zfr6fix-11-iridium-ix-spark-plug-4-pack store_origin: US region: United States of America --- # 0.6mm iridium fine tip for extreme ignitability High melting point iridium alloy for superior durability Triple gasket seal eliminates combustion gas leakage NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) **Brand:** ngk **Price:** $87.93 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your ride with precision and power! ## Quick Answers - **What is this?** NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) by ngk - **How much does it cost?** $87.93 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/30336700-ngk-6441-zfr6fix-11-iridium-ix-spark-plug-4-pack) ## Best For - ngk enthusiasts ## Why This Product - Trusted ngk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **OEM Trusted Quality:** World’s largest OEM spark plug supplier—guaranteed fit and performance for your vehicle. - • **Endurance Engineered:** Iridium alloy withstands extreme heat and wear, ensuring long-lasting performance for high-demand engines. - • **Leak-Proof Reliability:** Triple gasket seal design prevents combustion gas leaks, maximizing engine efficiency. - • **Precision Ignition Power:** Laser-welded 0.6mm iridium tip delivers unmatched spark consistency and throttle response. - • **Optimized Fouling Resistance:** Longer insulator nose and corrugated ribs reduce fouling and flashover for cleaner, smoother operation. ## Overview The NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug 4-pack combines cutting-edge iridium technology with OEM-grade reliability. Featuring a laser-welded 0.6mm fine iridium tip, triple gasket sealing, and advanced fouling resistance, these plugs deliver superior ignitability, durability, and engine efficiency—perfect for performance enthusiasts demanding consistent power and longevity. ## Description Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior fouling. The 0.6mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. Longer insulator nose avoids fouling, the corrugated ribs on insulator avoids flashover, and a triple gasket seal eliminates combustion gas leakage. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines. Trivalent metal plating has superior corrosion and seizing properties. ## Features - Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity. - Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer - NGK is the world's largest supplier of OEM spark plugs - Research Applications Prior to Purchase To Make Sure This OEM Part Fits Your Vehicle, Including Engine, Drivetrain and Quantity Needed. - This Listing is for 4 Spark Plugs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CC0E6GA | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #139,484 in Automotive ( See Top 100 in Automotive ) #944 in Automotive Replacement Spark Plugs | | Brand | NGK | | Brand Name | NGK | | Compatible with Vehicle Type | Motorcycle | | Core Material | Iridium | | Customer Reviews | 4.8 out of 5 stars 878 Reviews | | Global Trade Identification Number | 00087295064412 | | Included Components | 6441 | | Item Weight | 0.01 Ounces | | Manufacturer | NGK | | Manufacturer Part Number | 6441-4PK | | Manufacturer Warranty Description | Includes manufacturer provided warranty | | Model Number | 6441-4PK | | Thread Size | 14mm x 19mm | | Top Material Type | Metal | | UPC | 087295064412 | | Unit Count | 1 Count | | Vehicle Service Type | Motorcycle | ## Product Details - **Brand:** NGK - **Core Material:** Iridium - **Thread Size:** 14mm x 19mm - **Top Material Type:** Metal - **Vehicle Service Type:** Motorcycle ## Images ![NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) - Image 1](https://m.media-amazon.com/images/I/81lMBJ-5KgL.jpg) ![NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) - Image 2](https://m.media-amazon.com/images/I/81j6VztQB8L.jpg) ![NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) - Image 3](https://m.media-amazon.com/images/I/71UT4tYQitL.jpg) ![NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug (4 Pack) - Image 4](https://m.media-amazon.com/images/I/61pRw94V5LL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***N on August 1, 2016* ### ⭐⭐⭐⭐⭐ Review *by Z***N on March 16, 2026* ### ⭐⭐⭐⭐⭐ Review *by A***R on May 19, 2023* ## Frequently Bought Together - NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug, Pack of 4 - ENA Set of 4 Ignition Coil Pack Compatible with Honda Civic 2001 2002 2003 2004 2005 Acura EL 2002 2003 2004 L4 1.7L Coils for UF307 UF400 UF512 5C1451 E1012 UF307 30520P8EA00 C1460 - A-Premium 2-PC Cabin Air Filter w/Activated Carbon Compatible with Honda & Acura Model - Civic (01-05), CR-V (02-06), Element (03-11), CSX (06), EL (97-00 02-05), RSX (02-06) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/30336700-ngk-6441-zfr6fix-11-iridium-ix-spark-plug-4-pack](https://www.desertcart.us/products/30336700-ngk-6441-zfr6fix-11-iridium-ix-spark-plug-4-pack) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-08*